In my opinion, Scent Blocker/Scent Lok as well as any scent spray are just another thing you can throw into your bag of tricks. I believe they definately help but are not the be all end all of being winded by a deer. Personally i am also religious with my scent and hope it helps me in the woods, but if i get busted its impossible for me to blame it on scent control. Sometimes you get busted because you moved, squeeked etc. There a lot more to just scent for reasons of being busted. Just my thoughts.